Raid Technology

ABSTRACT

RAID is now used as an umbrella term for computer data storage schemes that can divide and replicate data among multiple physical drives. The physical drives are said to be in a RAID, which is accessed by the operating system as one single drive. The different schemes or architectures are named by the word RAID followed by a number (e.g., RAID 0, RAID 1). Each scheme provides a different balance between two key goals: increase data reliability and increase input/output performance.

RAID, acronym for Redundant Array of Independent Disks (originally Redundant Array of Inexpensive Disks), is a storage technology that provides increased reliability and functions through redundancy. This is achieved by combining multiple disk drive components into a logical unit, where data is distributed across the drives in one of several ways called "RAID levels"; this concept is an example of storage virtualization and was first defined by David A. Patterson, Garth A. Gibson, and Randy Katz at the University of California, Berkeley in 1987 as Redundant Arrays of Inexpensive Disks.[1] Marketers representing industry RAID manufacturers later attempted to reinvent the term to describe a redundant array of independent disks as a means of dissociating a low-cost expectation from RAID technology. 

TABLE OF CONTENTS

CERTIFICATION PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

CHAPTER ONE

1.0 INTRODUCTION

1.1STATEMENT OF PROBLEM

1.2PURPOSE OF STUDY

1.3IMPORTANCE OF STUDY

1.4DEFINITION OF TERMS

1.5ASSUMPTION OF STUDY

CHAPTER TWO

2.0 LITERETURE REVIEW

CHAPTER THREE

3.0 PROBLEMS WITH RAID

3.1 CORRELATED FAILURES

3.2 ATOMICITY

3.3 WRITE CACHE RELIABILITY

3.4 EQUIPMENT COMPATIBILITY

3.5 DATA RECOVERY IN THE EVENT OF A FAILED ARRAY

CHAPTER FOUR

4.0 RAID 10 VERSUS RAID 5 IN RELATIONAL DATABASES

CHAPTER FIVE: CONCLUSION

5.1LIMITATION OF STUDY

5.2SUGGESTION FOR FURTHER RESEARCH

5.3 REFERENCES